import java.util.Random;

/** An instance of this class represents a (fair) six-sided die, such as are
**  commonly used in board games (e.g., Monopoly).
**
**  Author: R. McCloskey
**  last modified: 2014-10-29
*/

public class Die {

   // instance variables (fields/attributes)
   // --------------------------------------

   private int numPips;      // result of most recent roll of the die
   private int rollCounter;  // # of times the die has been rolled
   private Random rand;      // for generating pseudo-random numbers
                             // to simulate rolling a die

   // constructor
   // -----------

   /* Initializes this die's fields.
   */
   public Die() {
      this.numPips = 1;        // arbitrarily say 1 pip is showing
      this.rollCounter = 0;
      this.rand = new Random();
   }

   public Die(int seed) {
      this.numPips = 1;
      this.rollCounter = 0;
      this.rand = new Random(seed);
   }


   // observers
   // ---------

   /* Returns the number of pips "showing" on this die.
   */
   public int getNumPips() { return this.numPips; }

   /* Returns the # of times that this die has been rolled during its lifetime.
   */
   public int getRollCount() { return this.rollCounter; }

   /* Returns a string containing this die's current face value inside
   *  a pair of square brackets.
   */
   public String toString() { return "[" + this.numPips + "]"; }



   // mutators
   // --------

   /* Rolls this die.
   */
   public void roll() { 
      this.numPips = this.rand.nextInt(6) + 1;
      this.rollCounter = this.rollCounter + 1;
   }

}